Once you have decided the technique of balayage you are left with the color and the amount to choose from. It can end up being either too much ( in a lot of cases ) or you may think not enough.
The idea of balayage in itself is subtle and given the fact that it isn’t done at the roots it is meant to be a more natural approach to colouring. Do you go ash, can it go ash, should you still be a warm blonde. All these questions can be talked about when you are consulting the stylist depending on your skin tone and the overall look you had in mind.
Yes it’s cool and if it is done the right way can last months and months before you need to do it again.